Preparation and structure of carbonated calcium hydroxyapatite substituted with heavy rare earth ions

作者：Yasukawa Akemi^*; Kandori Kazuhiko; Tanaka Hidekazu; Gotoh Keiko

来源：Materials Research Bulletin, 2012, 47(5): 1257-1263.

DOI：10.1016/j.materresbull.2012.01.018

• Inorganic compounds
• Crystal growth
• Electron microscopy
• X-ray diffraction
• Crystal structure

Calcium hydroxyapatite(CaHap) particles substituted five types of heavy rare earth ions (Ln: Y3+, Gd3+, Dy3+, Er3+ and Yb3+) were synthesized using a precipitation method and characterized using various means. These Ln ions strongly affected the crystal phases and the structures of the products. With increasing Ln/(Ln + Ca) in the starting solution ([X-Ln]), the length and the crystallinity of the particles first increased and then decreased. The rare earth metal-calcium hydroxyapatite (LnCaHap) solid solution particles were obtained at [X-Y] %26lt;= 0.10 for substituting Y system and at [X-Ln] %26lt;= 0.01-0.03 for substituting the other Ln systems. LnPO(4) was mixed with LnCaHap at higher [X-Ln] for all Ln systems. A series of yttrium-calcium hydroxyapatite (YCaHap) solid solutions with [X-Y] = 0-0.10 were investigated using XRD, TEM, ICP-AES, IR and TG-DTA in detail.

• 出版日期2012-5